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#include <QMap>
#include <QString>
#include <QSettings>
#include <QTranslator>
#include <QtAlgorithms>
#include <QtGui/QApplication>
#include <QDesktopWidget>
#include <QLocale>
#include <QtDebug>
#include <QMessageBox>

#include <cstdlib>
#include <iostream>
#include <string>

#include "command_line_options.h"
#include "dialog.h"
#include "globals.h"
#include "vsession.h"
#include "xsession.h"
#include "httpxmldownloader.h"
#include "choosersettings.h"

int main(int argc, char *argv[]) {
	QApplication a(argc, argv);

	QTranslator translator;
	translator.load(":" + QLocale::system().name());
	a.installTranslator(&translator);

	CommandLineOptions cmdOptions(argc, argv);

	QString autostart_uuid("");

	std::string usage(
			a.translate("Console", "Usage: vmchooser [ OPTIONS ]\n\n"
					"  --allow-vm-edit   show the 'edit this vm' checkbox\n"
					"  --autoquit [secs] automatically exit if no selection is made after secs seconds\n"
					"  -b  --base        base directory where VM images are accessible\n"
					"  -d, --default     name of default session\n"
					"  -c, --config      alternative config file\n"
					"  -l, --locations   location id(s), space separated\n"
					"  --location-mode   how to treat entries for this location (IGNORE, BUMP or EXCLUSIVE)\n"
					"  --exam-mode       enable exam mode\n"
					"  -P, --pool        one or more pool names to display (comma separated)\n"
					"  -f, --file        direct boot .desktop file\n"
					"  -x, --xpath       path of X Session .desktop files\n"
					"  -u, --url         url of vmware .xml file\n"
					"  -s, --size        window size <width>x<height>\n"
					"  -t, --theme       theme\n"
					"  --template-mode   how to treat template entries (IGNORE or BUMP)\n"
					"  -p, --pvs         show pvs options\n"
					"  --pvs-checked     check pvs box by default\n"
					"  -D, --debug       print debug information\n"
					"  -v, --version     print version and exit\n"
					"  -h, --help        print usage information and exit\n"
					"  -S, --runscript   change path to run-virt.sh\n"
					"  -T  --tab         default tab (0=xsession, 1=my vms, 2=all vms)\n"
					"  --no-vtx          Host doesn't support VT-x/AMD-V (mark 64bit guests)\n"
					"  --start-uuid      start lecture with the given uuid\n"
					"\nFILE can be a vmware .xml or an X .desktop file\n").toUtf8().data());

	if (cmdOptions.contains("error")) {
		std::cerr << usage;
		return EXIT_FAILURE;
	}

	if (cmdOptions.contains("usage")) {
		std::cout << usage;
		return EXIT_SUCCESS;
	}

	if (cmdOptions.contains("version")) {
		std::cout << "vmchooser " << VMCHOOSER_VERSION << std::endl;
		return EXIT_SUCCESS;
	}

	if (cmdOptions.contains("uuid")) {
		autostart_uuid = cmdOptions.value("uuid");
	}

	if (cmdOptions.contains("file")) {
		QString file(cmdOptions.value("file"));

		if (file.endsWith(".desktop")) {
			XSession s;
			if (s.init(file) && s.run()) {
				return EXIT_SUCCESS;
			}
			std::cerr
					<< a.translate("Console",
							"vmchooser: failed to run session").toUtf8().constData()
					<< std::endl;
			return EXIT_FAILURE;
		} else {
			std::cerr
					<< a.translate("Console", "vmchooser: invalid session file").toUtf8().constData()
					<< std::endl;
			return EXIT_FAILURE;
		}
	}

	// read configuration file:
	//   file supplied as command line option or
	//   user vmchooser.conf or
	//   global vmchooser.conf
	QString confFile;
	if (cmdOptions.contains("config")) {
		if (QFileInfo(cmdOptions.value("config")).exists()) {
			confFile = cmdOptions.value("config");
		} else {
			std::cerr << a.translate("Console", "Requested --config not found: ").toUtf8().constData() << cmdOptions.value("config").toUtf8().constData() << std::endl;
		}
	}
	if (confFile.isEmpty() && QFileInfo(userConfFile).exists()) {
		confFile = userConfFile;
		std::cerr << a.translate("Console", "Using user specific config: ").toUtf8().constData() << userConfFile.toUtf8().constData() << std::endl;
	}
	if (confFile.isEmpty() && QFileInfo(globalConfFile).exists()) {
		confFile = globalConfFile;
		std::cerr << a.translate("Console", "Using global config: ").toUtf8().constData() << globalConfFile.toUtf8().constData() << std::endl;
	}
	if (confFile.isEmpty()) {
		std::cerr << a.translate("Console", "No config file found or given").toUtf8().constData() << std::endl;
	}

	// TODO: This is the system wide settings, give proper name
	QSettings settings(confFile, QSettings::IniFormat);
	settings.setIniCodec("UTF-8");

	if (ChooserSettings::getSetting("last-session").isEmpty()) {
		QString defaultSession;
		if (cmdOptions.contains("default")) {
			defaultSession = cmdOptions.value("default");
		} else if (settings.contains("default")) {
			defaultSession = settings.value("default").toString();
		}
		ChooserSettings::setSetting("last-session", defaultSession);
	}

	if (cmdOptions.contains("xpath")) {
		xSessionPath = cmdOptions.value("xpath");
	} else if (settings.contains("xpath")) {
		xSessionPath = settings.value("xpath").toString();
	}  // else keep default path

	if (cmdOptions.contains("url")) {
		urlBase = cmdOptions.value("url");
	} else if (settings.contains("url")) {
		urlBase = settings.value("url").toString();
	} else {
		std::cerr
				<< a.translate("Console", "vmchooser: no URL given").toUtf8().data()
				<< std::endl;
		return EXIT_FAILURE;
	}

	// Change the runVmScript path
	if (cmdOptions.contains("runscript")) {
		runVmScript = cmdOptions.value("runscript");
	} else if (settings.contains("runscript")) {
		runVmScript = settings.value("runscript").toString();
	}

	/* PARSE URL */
	if (!urlBase.startsWith("http://")) {
		std::cerr
				<< a.translate("Console", "vmchooser: invalid URL").toUtf8().data()
				<< std::endl;
		return EXIT_FAILURE;
	} else {
		if (!urlBase.endsWith("/")) {
			urlBase += "/";
		}
	}

	QString size;
	int width, height;
	if (cmdOptions.contains("fullscreen")) {
		size = "fullscreen";
	} else if (settings.contains("fullscreen")) {
		size = "fullscreen";
	} else if (cmdOptions.contains("size")) {
		size = cmdOptions.value("size");
	} else if (settings.contains("size")) {
		size = settings.value("size").toString();
	}

	if (size != "fullscreen") {
		QRegExp rx("^(\\d+)x(\\d+)$");
		if (rx.indexIn(size) != -1) {
			QStringList list = rx.capturedTexts();
			width = list.value(1).toInt();
			height = list.value(2).toInt();
		} else if (!size.isEmpty()) {
			std::cerr
					<< a.translate("Console", "vmchooser: invalid size argument").toUtf8().data()
					<< std::endl;
			return EXIT_FAILURE;
		} else {
			width = VMCHOOSER_DEFAULT_WIDTH;
			height = VMCHOOSER_DEFAULT_HEIGHT;
		}
	}

	if (cmdOptions.contains("pool")) {
		pool = cmdOptions.value("pool");
	} else if (settings.contains("pool")) {
		pool = settings.value("pool").toString();
	}

	if (cmdOptions.contains("theme")) {
		theme = cmdOptions.value("theme");
	} else if (settings.contains("theme")) {
		theme = settings.value("theme").toString();
	}

	if (cmdOptions.contains("debugMode")) {
		debugMode = true;
	}

	if (cmdOptions.contains("base")) {
		basePath = cmdOptions.value("base");
	} else if (settings.contains("base")) {
		basePath = settings.value("base").toString();
	} else if (settings.contains("path")) { // Compatibility to v1.0
		basePath = settings.value("path").toString();
	}

	if (cmdOptions.contains("location-mode")) {
		QString mode = cmdOptions.value("location-mode");
		if (mode == "IGNORE") {
			g_forLocationHandling = LOCATION_IGNORE;
		} else if (mode == "BUMP") {
			g_forLocationHandling = LOCATION_BUMP;
		} else if (mode == "EXCLUSIVE") {
			g_forLocationHandling = LOCATION_EXCLUSIVE;
		} else {
			qDebug() << "Invalid location mode: " << mode;
			QMessageBox::critical(NULL, "Error", "Invalid location mode: " + mode);
			return 1;
		}
	}

	if (cmdOptions.contains("template-mode")) {
		QString mode = cmdOptions.value("template-mode");
		if (mode == "IGNORE") {
			g_templateHandling = LOCATION_IGNORE;
		} else if (mode == "BUMP") {
			g_templateHandling = LOCATION_BUMP;
		} else {
			qDebug() << "Invalid template mode: " << mode;
			QMessageBox::critical(NULL, "Error", "Invalid template mode: " + mode);
			return 1;
		}
	}

	int defaultTab = -1;
	if (cmdOptions.contains("tab")) {
		defaultTab = cmdOptions.value("tab").toInt();
	}

	QString locationIds;
	if (cmdOptions.contains("locations")) {
		locationIds = cmdOptions.value("locations");
	}

	if (cmdOptions.contains("no-vtx")) {
		g_noVtx = true;
	}

	if (cmdOptions.contains("pvs")) {
		g_pvsEnabled = true;
	}
	if (cmdOptions.contains("pvs-checked")) {
		g_pvsChecked = true;
	}

	if (cmdOptions.contains("autoquit")) {
		bool ok = false;
		g_autoQuitSeconds = cmdOptions.value("autoquit").toInt(&ok, 10);
		if (!ok) {
			g_autoQuitSeconds = 0;
		}
	}

	g_allowVmEdit = cmdOptions.contains("allow-vm-edit");

	/* read session files */
	QList<Session*> xsessions(XSession::readSessions(xSessionPath));

	Dialog w(defaultTab, cmdOptions.contains("exam-mode"));

	/* DOWNLOAD VSESSIONS */
	HttpXmlDownloader httpxmldownloader;
	httpxmldownloader.connectSlot(&w,
			SLOT(addSessionsAfterDownload(QNetworkReply*)));

	// read xml and add items later
	if (cmdOptions.contains("exam-mode")) {
		httpxmldownloader.makeRequest(urlBase + "list?exams=exam-mode", locationIds);
	} else {
		httpxmldownloader.makeRequest(urlBase + "list", locationIds);
	}

	/* DOWNLOAD NEWS */
	HttpXmlDownloader news_downloader;
	news_downloader.connectSlot(&w, SLOT(addNewsAfterDownload(QNetworkReply*)));
	news_downloader.makeRequest(urlBase + "news");

	/* DOWNLOAD HELP-SECTION */
	HttpXmlDownloader help_downloader;
	help_downloader.connectSlot(&w, SLOT(addHelpAfterDownload(QNetworkReply*)));
	help_downloader.makeRequest(urlBase + "help");

	w.setTheme();

	w.setWindowFlags(Qt::FramelessWindowHint);

	QRect desktopRect = QApplication::desktop()->availableGeometry(&w);
	if (size == "fullscreen") {
		width = desktopRect.width();
		height = desktopRect.height();
		_fullscreen = true;
	}

	w.resize(width, height);

	if (xsessions.size()) {
		qSort(xsessions.begin(), xsessions.end(), myLessThan);
		w.addItems(xsessions, 0);
	}

	w.show();

	if (autostart_uuid != "") {
		qDebug() << "using startSession() from main.cpp";
		w.startSession(autostart_uuid);
	}



	// center dialog on primary screen
	QPoint center = desktopRect.center();
	w.move(center.x() - w.width() * 0.5, center.y() - w.height() * 0.5);
	a.setActiveWindow(&w);

	return a.exec();
}